Is it really impossible to force umount on HP-UX

gogol_bordello · #1 (**permalink**) 05-11-2009

Hello,
yeah... here my question :
Exist some way to force umount on HP other than reboot?

Thanks
gb

vbe · #2 (**permalink**) 05-11-2009

Are you thinking of mounted NFS?

gogol_bordello · #3 (**permalink**) 05-11-2009

yes, sorry

nfs mounted but with link removed. can I umount it without reboot?

Here I've two solution, but I'm not sure they don't produce problems :
1- nfs.client stop/start
2- mv mnttab mnttab.old ; mountall

The problems are :
all other nfs mounted will be re-mounted?
will I cut communication with well-mounted fs?

vbe · #4 (**permalink**) 05-11-2009

Well all depends on what issue you are to deal with...
Usually I expect from someone asking such a question is because he is stuck with a faulty NFS (NFS server down etc...) where its a nightmare whenever someone types bdf of ll etc... and yes since the NFS server isnt responding - ouy are quite in a mess...

What do you call nfs mounted but with link removed?

vbe · #5 (**permalink**) 05-11-2009

If is it mounted and the server is responding, then start by seing if you can free the "device" then umounting it:

Code:

fuser -cku <your mountpoint>
umount <your mountpoint>

gogol_bordello · #6 (**permalink**) 05-11-2009

... one more job en run that I could not kill :-/

server# ps -ef | grep fuser
root xxx xxx 0 xxx pts/xx 0:00 fuser -cku /mounting_point

vbe · #7 (**permalink**) 05-11-2009

you are in / arent you when you type fuser?
If it is trying (as it seems) I supect you have also an issue with the NFS server:
to make sure rpc.statd and rpc.lockd are available and responding to RPC requests:

Code:

/usr/bin/rpcinfo -u servername status
/usr/bin/rpcinfo -u servername llockmgr
/usr/bin/rpcinfo -u servername nlockmgr
/usr/bin/rpcinfo -u clientname status
/usr/bin/rpcinfo -u clientname llockmgr
/usr/bin/rpcinfo -u clientname nlockmgr

If any of these commands returns RPC_TIMED_OUT, the rpc.statd or rpc.lockd process may be
hung.

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